funryannette funryannette

30-09-2016
Physics

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a car has an initial velocity of 45m/s and a final velocity of 0m/s 9 seconds later.
a. what is the acceleration?
b. how far did they travel during the 9s?

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Аноним Аноним

01-10-2016

a)a=v/t=(v0-vi)/t=-45/9=-5m/s^2 b)v=v0^2+2ad; 0=2025-2•5•d; 10d=2025; d=202,5m

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